Gram River

The anime's main protagonist. At the onset of the series Gram lives in the City-Ship of Adena. Gram is athletic and can hold his own in a fight, but is generally a peace-loving, laid-back person who enjoys cooking and honest toil more than fighting, although all three tend to suffer if he's distracted. He is also a competent pilot and hand-to-hand fighter due to the various jobs he has worked, which include as a circus performer and a heavy machine operator. He also tends to be rather reckless and optimistic about what he does, such as using the dangerous ice-booster skis.

Gram was apparently abandoned or orphaned in infancy, and it is implied that his parents were royalty among Mars aborigines because they left him "The Mark of the Chief," a special necklace that led to the Stone of the Gods. Gram grew up with Vestemona and some smaller children, stealing and making what money they could just to survive. After his adoption by Mr. Lauren, Gram took care of the younger children himself, and worked assorted jobs along with Bon. But when he tried to rescue Bon from the military during one of the Ship of Aurora&#039;s raids, Gram fell into the water and was captured by a strange Round Buckler that had been summoned by his necklace. The military assumed that this strange RB must be working with the Ship of Aurora, and Gram defended himself against their attacks.
Because of his rare RB and his skills, Captain Elizabeth allowed him to become part of the crew. Gram became friends with several people in the crew, and endeared himself to them by also becoming the ship's cook. He also bumped into Vestemona in a restaurant and ended up being chased through the streets of Adena with her. She berated him for not thinking of his future and even fired a gun at him, but Gram continued to not believe that she would actually hurt him. He also kissed her just before boarding the Ship of Aurora.

Gram discovered what "The Mark of the Chief" really was when they visited the Mars aborigines, and he rescued an elderly lady who was reclaiming some aboriginal relics. He was given the Box of Guidance to show him where the Stone of the Gods was, and defended it against several attempts to steal it. He also was challenged to a duel by the disgraced, presumed-dead Vestemona, and arrived without weapons because he didn't believe she actually wanted to fight, and he just wanted to return a scarf she had previously bandaged his arm with. The two fought with swords, and Vestemona ended up blurting out how she felt about Gram, and Gram assured her that she could start over again.

Gram then found the Stone of the Gods, and dueled with the mercenary pirate Kubernes over it, only to have his shipmates arrested and the Stone taken by their enemies. Gram played a central part in freeing the Ship of Aurora's crew before they could be executed, along with Vestemona and Enora. The Vector of Hope seems to have been irrevocably damaged during the fight.

As the series ends, we see that Gram has recovered a large ship that he found in the Ice Graveyard, comparable in size to the Ship of Aurora. He, Vestemona and the two children from Adena board it with the intention of living there, and he names it the "Ship of Hope."